BS-5600-3.11.2-1984.pdf
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1、BRITISH STANDARD BS 5600-3.11.2: 1984 Powder metallurgical materials and products Part 3: Methods of testing sintered metal materials and products, excluding hardmetals Section 3.11 Determination of apparent hardness Subsection 3.11.2 Case-hardened ferrous materials, surface enriched by carbon or ca
2、rbon and nitrogen UDC 621.762:669-138.8:620.178.152:669.1-155.2 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5600-3.11.2:1984 This British Standard, having been prepared under the direction of the Iron and Steel Standards Committee, wa
3、s published under the authority of the Board of BSI and comes into effect on 30 April 1984 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference ISE/65 Draft for comment 81/70644 DC ISBN 0 580 13730 9 Foreword This Subsection of BS 5600 has been prepared u
4、nder the direction of the Iron and Steel Standards Committee and is technically equivalent to ISO 4498-2 “Sintered metal materials, excluding hardmetals Determination of apparent hardness Part 2: Case-hardened ferrous materials, surface enriched by carbon or carbon and nitrogen”. This Subsection is
5、one of a series of Sections and Subsections that comprise BS 5600. The contents of BS 5600 are given in Section 1.1. Section 1.2 is a glossary of technical terms that have particular application in the powder metallurgical industry and which are used in the Sections and Subsections of this British S
6、tandard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document c
7、omprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issue
8、d since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5600-3.11.2:1984 BSI 10-1999i Contents Page ForewordInside front cover 1Scope1 2Principle1 3Apparatus1 4Preparation of test pieces1 5Procedu
9、re1 6Expression of results1 7Test report1 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:34 GMT+00:00 2006, Uncontrolled Copy, (
10、c) BSI BS 5600-3.11.2:1984 BSI 10-19991 1 Scope This Subsection of BS 5600 describes two methods for determining the apparent hardness1) of surfaces of sintered metal materials (excluding hardmetals) which have been heat treated in such a way that the hardness is not uniform in the section to a dept
11、h of 5 mm below the surface. It therefore applies to materials (excluding hardmetals) in which the hardness is obtained essentially by surface enrichment by carbon or by carbon and nitrogen, e.g. by carburizing, carbonitriding, nitrocarburizing or sulphidizing. NOTEThe titles of the publications ref
12、erred to in this standard are listed on the inside back cover. 2 Principle Determination of the apparent hardness of a test piece by either the Vickers hardness test or the Rockwell superficial hardness test, N scale. 3 Apparatus The apparatus shall be as given in BS 427-1 in the case of the Vickers
13、 hardness test. Apparatus for the Rockwell superficial hardness test shall be as given in ISO/R 1024. 4 Preparation of test pieces The sintered metal surface used as the test piece shall be clean, smooth and flat in order to obtain well-defined hardness indentations. NOTE 1This requirement is partic
14、ularly important when determining Vickers hardness. NOTE 2It is generally found sufficient to clean the surface with a suitable solvent. Alternatively, the surface may be lightly polished provided that laboratory measurements have shown that the influence of such polishing is insignificant. This pol
15、ishing may be carried out, for example, by using metallographic paper or 6 4m diamond paste. NOTE 3Since the apparent hardness of a sintered material is affected by density, which can vary in different zones of the part, the position of the hardness indentations, for the purpose of quality control,
16、should be agreed between the parties. 5 Procedure 5.1 Determine the hardness in the specified zone of the test piece, making a number of indentations using either of the following test methods. a) The Vickers hardness test in accordance with BS 427-1, using either 1) a load of 49.03 N (HV5); or 2) a
17、 load of 9.807 N (HV1). NOTEThe load used in the test should be agreed between the parties. The load of 9.807 N (HV1) should be used if the effective case-depth of the material is small. b) The Rockwell superficial hardness test, N scale, in accordance with ISO/R 1024, using either 1) a load of 147.
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